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author | Gabe Black <gblack@eecs.umich.edu> | 2009-04-19 04:56:40 -0700 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2009-04-19 04:56:40 -0700 |
commit | 43f58927d693fbe18a7db2e20f540da13bc15cd3 (patch) | |
tree | 8e328e9b661da1448ce4e24783b18a63b0c961d6 /src/arch/x86/isa/insts/general_purpose/semaphores.py | |
parent | b493906eb9d7674d8ae1700d07168303ec56cf02 (diff) | |
download | gem5-43f58927d693fbe18a7db2e20f540da13bc15cd3.tar.xz |
X86: Implement a locking version of CMPXCHG.
Diffstat (limited to 'src/arch/x86/isa/insts/general_purpose/semaphores.py')
-rw-r--r-- | src/arch/x86/isa/insts/general_purpose/semaphores.py | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/semaphores.py b/src/arch/x86/isa/insts/general_purpose/semaphores.py index f23241863..a34e2a3c7 100644 --- a/src/arch/x86/isa/insts/general_purpose/semaphores.py +++ b/src/arch/x86/isa/insts/general_purpose/semaphores.py @@ -79,6 +79,25 @@ def macroop CMPXCHG_P_R { mov rax, rax, t1, flags=(nCZF,) }; +def macroop CMPXCHG_LOCKED_M_R { + ldstl t1, seg, sib, disp + sub t0, rax, t1, flags=(OF, SF, ZF, AF, PF, CF) + + mov t1, t1, reg, flags=(CZF,) + stul t1, seg, sib, disp + mov rax, rax, t1, flags=(nCZF,) +}; + +def macroop CMPXCHG_LOCKED_P_R { + rdip t7 + ldstl t1, seg, riprel, disp + sub t0, rax, t1, flags=(OF, SF, ZF, AF, PF, CF) + + mov t1, t1, reg, flags=(CZF,) + stul t1, seg, riprel, disp + mov rax, rax, t1, flags=(nCZF,) +}; + def macroop XADD_M_R { ldst t1, seg, sib, disp add t2, t1, reg, flags=(OF,SF,ZF,AF,PF,CF) |